The Cayenne is a luxury, midsized, unibody SUV. Developed with the Volkswagen Touareg, it comes with a choice of a Volkswagen-based V6 engine, a Porsche V8, or a twin-turbo version of the V8. The Turbo S comes with an even more powerful turbo V8. Low-range gearing and advanced electronics promise some off-road capability. The S and Turbo are very fast but lack the trademark agility of a Porsche. Some controls are overly complicated. Like the Range Rover, the Turbo has an automatically adjustable ride height. Well-below average reliability has been a disappointment. There will be no 2007 Cayenne as dealers await a 2008 freshening.